Hose fitting



Patented Mats; 1927. I 1,620,} 14 v I UNIT-ED STATES 'rnr azurv OFFICE;

T HY DRAULIC BRAKE COMPANY, OF LOS ANGELES, CALIFORNIA, A CORPORA- T10110]? CALIFORNIA.

nosn rrr'rms.

Application filed January 23, 1922. Serial No. 531,141.

My mventionirelates to a reinforced hose outer end with a flange orshoulder 10, which 65 fitting. The object of the invention is thev fitssnugly against the adjacent'end of the provision of a reinforced hosefitting that externally threaded boss 11 of element B, .is comparativelycheap to manufacture, and shoulderlO preferably being provided withsimple and durable in construction, but an annular bevel 12. It will beunderstood .which is nevertheless so constructed thatdhe that thethreads or boss 9 are adaptedto be 6 fitting may be easily applied to ahose and cngaged by an outer collar for the purpose 7 be caused securelyto engage the latter with of drawing beveled surface 12 tightly 'in enafluid tight fit. gagement with a correspondingly shaped w The fittingillustrated in the accompanyseat in a couplingmember which mates the ingdrawings is a hose coupling device, but one herein illustrated anddescribed in del appreciate that the salient features of my tail. Themating coupling member and its invention are applicable to various otherassociated nut are illustrated at X and Y hosefittings, such as hosenozzles, hose "end tespectively. That end of element A remote plugs,etc. The reinforced hose disclosed from flange or shoulder ispreierably'remay be employed wherever a hose of great ducedin'diameterto provide a nipple 13, strength is desired, but isparticularly dewhich may be inserted into the hose 'towhich signed foruse in the pipe lines of fluid opthe coupling member is to be attached.Niperated braking systems} 7 ple 13 is provided with external flan es orSince my invention will best be understood annular ridges 13 -43, whichnee 7 not from a description read. in connection with differ essentiallyfrom the ridges found upon an illustrativedrawing, I shall proceed atordinary hose fittings. I a once to a description of the accompanyingElement B similarly to element A is drawing, in which-- formed in oneieee, andin addition to boss Figure 1 is a sideelevational view illllS-r11 comprises t e body portion 14 and the trating a hose coupling memberembodying comparatively thin sleeve -151 It will be my invention as itappears when fitted upon noted that the sleeve 15 ori ally curves asection of hose, portionsof a co operating' outwardlyaway from theho yportion, as coupling member being illustrated insec 'indicatedat 15.Sleeve 15 is provided on tion in this view; its inner surface withaiplurality or in-- Fi re 2 is an end view of the coupling wardlyextending ridges 15. Prior to the as mem er dissociated from the f partsshown application ofthe cou ling to the hose, the i in sectionin Figure1; J inner diameter oi t e sleeve is shahtly Figure 3 is an axialsectional view of the greater than the outerdiameter oi the ose. hoseand coupling member; 1 The hose is indicated at H, beingillustratedFigure & is a transverse'section taken 'on in dottedlines in Figures 5andt, 'andinc ,line 4-4 of Figure 3; full lines inFigures 1, 3 and 4. r

' Fi re 5 is an axial sectional view of the Before applying the fittingor coup 1 couplii lg member as ,it appears prior to apmember to a hose,the element 'Ais place plication to the hose, one of the elements of inelement 13, as illustrated in Figure 5. The

the coupling member being illustrated in hose H is now slipped intosleeve 15, and elevation, the other element eing illustrated around theridged i ple 12.' Sleeve 15" is. in axial section, and 1 now subjectedto .a iameter reducing op- Figure 6 is a transverse section taken'on'eration, which eliminates the curve 15", and 1 line 6-6 of Figurefi. 1causes the outer cylindrical surface of the Similarv characters ofreference refer to sleeve to lieflush with the curved-surfaces" 1 4similar parts throughout the several views. of body po ion 14..Thereduction in the 5 Referring first to Figure 6, it will'be noteddiameter ofe sleeve may be accomplished 5 that the coupling membercomprises an in by means of a reducing die or by aspinmug ner element .Aand an outer element B. Eleoperation, If referred,.the bod rtion" ment'A' is provided with a bore Land has 14; may be provided with o posite yted I wonder cylindrical" surface 8,,which. fits plane surfaces*14-'14,wch permit eIe-f snugly in the bore 9 of the outer element -B. ment B tobe grasped-bye, suitable tool. The l Element A is furthermore providedat its reductiffitof theouter diameter of sleeve-15 g results in acorresponding reduction of its inner diameter, and increases its lengthsomewhat. I prefer to so perform the diameter reducing operation as toleave the sleeve with a belled or outwardly flaring edge This belled oroutwardly flaring edge, together with the fact that the nipple 13terminates a short distance within the sleeve 15,

,permits the hose to articulate relatively to the fitting,,Withincertainlimits, without inury to the hose. Terminating the nipple 13 somedistance within the sleeve 15 prevents the hose being cut by the end ofthe nipple.

That portion of the hose which lies between nipple 12 and sleeve 15 isvery considin the inner and outer surfaces of the hose,

respectively. This arrangement provides a fluid-tight connection, andalso enables the hose to withstand longitudinal stresses tending to pullit off of the nipple.

A particular advantage is afiorded by the i fact that the elements A andB are mechanically connected together. I In the preset instance, thismechanicalconnection is a orded by the elementsX and Y'. Any otherequivalent form of mechanical connection I may be employed. In fact. Icontemplate to form the fitting andB that in some cases it maybedesirable to form the elements A and B from a single piece of metal.Since both the nipple 12 and sleeve 15 are in frictional contact withthe hose, it will be seen that each of these parts tends to preventdislodgme-nt of the other.

Element A may, of course, be formed of any suitable material, but ispreferably formed of metal. Element B is formed of any metal, such asbrass, which can successfully be subjected to the diameter reducingoperation hereinbefore described. I prefer of my invention in two parts,but appreciate that the elements A could'be formed in one piece ifdesired. In practice, itis' sometimes found difficult to devise a hosewhich will withstand the great pressures to which the fluids therein aresubjected, as in the supply pipes of a fluid operated brake system foran automoile. The proper operation of fluid operated brake systems isdependent on the maintenance in the system of a predetermined vol-' umeof fluid and the povision of means whereby the brakes will properlyapplied as the result of a predetermined movement of the fluiddisplacing means or operating plunger. Due to these requirements-of thecommercially satisfactory system, expansion of the members containingthe fluid of an would result in an unsatisfactory operation has no'looseends of the brakes. For example, if the pressure required tosatisfactorily. operate the brakes is 500 pounds per square inch and theconveying hose or tube is of such a character that material expansiontherein will be caused by a pressure of less than 500 pounds per squareinch, the pressure created in the system will tend to expand the fluidconveyin'g tube or hose, and'thus fail to produce in the system the 500pounds pressure which is required to properly operate the brakes. Thus,a fluid conveying tube or hose employed in' a fluid operated brakingsystem must be of such a character as to he practically non-expansivewhen subjected tointernal pressures such as required to operate thebrakes. To avoid any possibility of the hose being ruptured, due tothese excessivepressures, and particularly to prevent the expansion ofthehose when subjected to these pressures applicant has provided a newand unique reinforcing arrangement consisting of the rings H* a aboutthe outer surface of the hose H; These rings H are formed of anysuitable metal, such as brass, which may be compressed to a less size.The rings H are originally of such a size as to permit rings arethen'suitably spaced on the hose by any suitable means, and are nextreduced "them to beslipped onto the\ hose H. The i hose will now beslightly bulged between the rings tofo rm the ridges H". Thus, thereinforcing rings are individually secured firmly to ,the hose. Thisprovides a structure I in which the repeated bending of the hose evidentthat the width of the rings and the distance between'them on the hosemay be varied according to the demands of the use to which the hose isto be put. The reinforced hose herein disclosed is particularly adaptedfor use with applicants ifitting, as it of mm for other devices on theoutside-of the-hose which must be seoured within or to the fitting.

' Having thus described my invention, what I claim as new and desire to'secure by Lette'rs Patent'of the United States is:

does not cause the reinforcing devicesfto 1. In combination a hose, anda plurality of gpaced apart metallic rings having inner $111 8- cos. ofgreater width than their outer surfaces, encircling said hose and comepressed thereupon, whereby the diver-gin sides of. the ringscause thesurface of sai hose between adjacent rings to he distorted to hold theringperuiaiicntly in position thereupon.

S2. in combination a hose of flexible inaterial, and a plurality ofspaced apart metal he rings having side edges divergent in a directiontoward the centers of said rings,

encircling. said hose and compressed thereupon, whereby the divergentedges thereot are imhedded-in the outer surface of said hose'toproduceridges therein between adjacent rings and hold said rings permanently inposition.

3. ln conihinationa. hose of flexible material. and a plurality ofspaced apart metallic rings encircling said hose and tightly corn ressedu on. the hose -whereb to cause the surface of the hose between adjacentrings to he distorted and hold the rings perintunently in positionthereon.

- L-ln combination a'flexible hose, a conanaemia necting' member for theend at said hose having a. sleeve encompassing the end portion of thehose and having its adjacent end flared outwardly away from the hose anda ring of unyielding material compressed aloout said hose adjacent tothe tlared end portion of said sleeve to prevent the expert sion andcontact of said hose with the end ofsaid sleeve upon the flexing of saidhose.

5Jln combination a flexible hose having an exterior rubber surface, aconnecting member tor the end of said hose having a sleeve contractedonto the surface of the hose suthciently to cause an extrusion of thesurface of the" hose beyond the end of the sleeve, the end of the sleevebeing flared outwardly to present a curved surface to the extrudedrubber; and metallic reinforcing means for the hose auljacent the end-0tthe sleeve to prevent the expansion of the hose.

